Beginning with ForeFlight Mobile version 10.0 you can use a Dual XGPS170, XGPS170D, or XGPS190 with ForeFlight Mobile, provided you install and use the Dual ADS-B Status Tool app. The Status Tool app is available from the Apple App Store: DUAL Status Tool App
See these DUAL instructions for complete details about configuring the Status Tool app to allow the XGPS170, XGPX170D, or XGPS190 to work with ForeFlight Mobile.
- Pair your iPad or iPhone with the XGPS (or connect, if previously paired)
- Open the Status Tool app
- Tap the "Setup" (gear) button
- Turn the "Support ForeFlight" switch ON
- Tap the "OK" button
- Leave the Status Tool app running in the background, then switch to ForeFlight Mobile